<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <input type="text" id="input">
    <script>
        /* 去除开头结尾的空格 */
        var res = []
        var reg = /^\s+|\s+$/g;
        var input = document.getElementById("input")
        input.onkeydown = function(event){
            if(event.keyCode == 13){
                var str = this.value
                res.push(str.replace(reg,""))
                console.log(res);
            }
        }
    </script>
</body>
</html>